Contdown on Servlet Session

Question

I need to create a countdown on the servlet´s session to fire events when X minutes to expire...

So, there is a way to know how many seconds is remaining to finish the session?

Answer 1

您可以使用HttpSession API计算剩余时间（以秒为单位）：

httpSession.getMaxInactiveInterval() - ((System.currentTimeMillis() - httpSession.getLastAccessedTime())/1000